In our study: How to become an entrepreneur, how to become a professional? we would like to present, after a brief empirical presentation of the development of the entrepreneurs and professions in Germany, a manual on how to reach entrepreneurial or professional self-employment. We would like to offer information and advise in the form of a practical overview about ideas, planning, realisation and management of a business start-up. In addition we would like to provide an address- list of relevant institutions and helpful internet-links.